Sudden illness while driving has been identified as a major cause of vehicle collisions, particularly among taxi drivers. However, no previous studies have examined the factors contributing to the occurrence of health-related vehicle collisions. The current study aimed to identify the risk factors causing health-related vehicle collisions among taxi drivers, and to inform preventative interventions. A cross-sectional survey involving a written anonymous questionnaire was conducted for company-employed taxi drivers in Chiba Prefecture, Japan. A total of 1,739 drivers returned questionnaires. Drivers were classified into those who had experienced collisions or near-miss incidents caused by health problems (Event group), and those who had not (Non-event group). According to a multivariable logistic regression analysis, being unable to take vacation time (odds ratio [OR] 4.59, 95% confidence interval [CI] 2.2–9.58), having chronic diseases (OR 1.52, 95% CI 1.02–2.27), taking insufficient vacation time (OR 1.81, 95% CI 1.19–2.79), and difficulty reporting poor health conditions (OR 2.29, 95% CI 1.36–3.87) were significant factors for the likelihood of an event. Support for drivers to maintain well-balanced control of illnesses and improvement of working environments could prevent health-related events while driving.
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